A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 7035-00-902-8995
NSN 5925-00-149-2855
NSN 6685-01-149-0590
NSN 5996-01-422-3087
NSN 5998-00-915-1495
NSN 2925-01-525-8212
NSN 5920-01-485-7798
NSN 4140-00-813-9557
NSN 7035-00-753-0695
NSN 6620-01-152-6837
NSN 5975-01-089-8641
NSN 5855-01-396-0258